77252144 has 20 divisors (see below), whose sum is σ = 150266424. Its totient is φ = 38473728.

The previous prime is 77252137. The next prime is 77252183. The reversal of 77252144 is 44125277.

It is a self number, because there is not a number n which added to its sum of digits gives 77252144.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5282 + ... + 13505.

Almost surely, 2^77252144 is an apocalyptic number.

It is an amenable number.

77252144 is a deficient number, since it is larger than the sum of its proper divisors (73014280).

77252144 is a wasteful number, since it uses less digits than its factorization.

77252144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19052 (or 19046 counting only the distinct ones).

The product of its digits is 15680, while the sum is 32.

The square root of 77252144 is about 8789.3198826758. The cubic root of 77252144 is about 425.8959534886.

The spelling of 77252144 in words is "seventy-seven million, two hundred fifty-two thousand, one hundred forty-four".